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Related Experiment Videos

Atrial natriuretic peptide decrease during spontaneous breathing with continuous positive airway pressure in

M Frass1, R Popovic, E Hartter

  • 1Second Department of Internal Medicine, University of Vienna, Austria.

Critical Care Medicine
|September 1, 1988
PubMed
Summary

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[Consensus statement of the Austrian Sleep Medicine Society on the management of residual excessive daytime sleepiness in obstructive sleep apnea].

Somnologie : Schlafforschung und Schlafmedizin = Somnology : sleep research and sleep medicine·2022

High levels of continuous positive airway pressure (CPAP) significantly reduce alpha-atrial natriuretic peptide (ANP) release in healthy individuals. This decrease in ANP may contribute to fluid retention during high CPAP therapy.

Area of Science:

  • Cardiology
  • Pulmonology
  • Endocrinology

Background:

  • Continuous positive airway pressure (CPAP) is used in respiratory support.
  • Alpha-atrial natriuretic peptide (ANP) plays a role in fluid and electrolyte balance.
  • The impact of CPAP on ANP release requires further investigation.

Purpose of the Study:

  • To investigate the effect of varying CPAP levels on plasma immunoreactive alpha-atrial natriuretic peptide (irANP) concentrations.
  • To explore the potential mechanisms linking high CPAP levels to fluid retention.

Main Methods:

  • 11 healthy male volunteers underwent continuous volume loading.
  • Participants received CPAP at 20, 10, and 0 cm H2O for 2-hour periods.
  • Peripheral venous blood samples were collected to measure plasma irANP concentrations via radioimmunoassay.

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Main Results:

  • Plasma irANP concentrations were significantly lower at 20 cm H2O CPAP compared to 10 and 0 cm H2O.
  • No significant difference in irANP levels was observed between 10 cm H2O and 0 cm H2O CPAP.
  • Higher CPAP levels led to a reduction in ANP release in volume-expanded subjects.

Conclusions:

  • CPAP at 20 cm H2O reduces ANP release in volume-expanded individuals.
  • This reduction in ANP may contribute to fluid retention and renal dysfunction associated with high CPAP.
  • Potential mechanisms include atrial compression and reduced venous return during high CPAP.